The model item passed into the dictionary is of type 'System

Mark Tabor

6y1.9k.NET

The model item passed into the dictionary is of type 'System.Collections.Generic.List`1[CMS_Monitoring.Models.Semester]', but this dictionary requires a model item of type 'CMS_Monitoring.Models.Student'.

I am not sure what is wrong I have checked and it looks everything is correct check my model class my controller code my View and my table

My Table is

My Controller :

public class SemestersController : Controller
{
private DatabaseContext db = new DatabaseContext();
// GET: Semesters
public ActionResult Index()
{
var semesters = db.Semesters.Include(s => s.Programs).Include(s => s.years);
return View(semesters.ToList());
}
// GET: Semesters/Details/5
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Semester semester = db.Semesters.Find(id);
if (semester == null)
{
return HttpNotFound();
}
return View(semester);
}
}
}

---MY VIEW IS

@model IEnumerable
@{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_LayoutStudent.cshtml";
}
Index
@Html.ActionLink("Create New", "Create")
class="table">
@Html.DisplayNameFor(model => model.Programs.Program_Title)
@Html.DisplayNameFor(model => model.years.Name)
@Html.DisplayNameFor(model => model.Semester_Title)
@Html.DisplayNameFor(model => model.Semester_Code)
@Html.DisplayNameFor(model => model.Semester_Duration_In_Weeks)
@Html.DisplayNameFor(model => model.Status)
@Html.DisplayNameFor(model => model.Semester_Start_Date)
@Html.DisplayNameFor(model => model.Semester_End_Date)
@Html.DisplayNameFor(model => model.Semester_Credit_Hours)
@Html.DisplayNameFor(model => model.Date_Created)
@Html.DisplayNameFor(model => model.Date_Modified)
@Html.DisplayNameFor(model => model.Added_By)
@foreach (var item in Model) {
@Html.DisplayFor(modelItem => item.Programs.Program_Title)
@Html.DisplayFor(modelItem => item.years.Name)
@Html.DisplayFor(modelItem => item.Semester_Title)
@Html.DisplayFor(modelItem => item.Semester_Code)
@Html.DisplayFor(modelItem => item.Semester_Duration_In_Weeks)
@Html.DisplayFor(modelItem => item.Status)
@Html.DisplayFor(modelItem => item.Semester_Start_Date)
@Html.DisplayFor(modelItem => item.Semester_End_Date)
@Html.DisplayFor(modelItem => item.Semester_Credit_Hours)
@Html.DisplayFor(modelItem => item.Date_Created)
@Html.DisplayFor(modelItem => item.Date_Modified)
@Html.DisplayFor(modelItem => item.Added_By)
@Html.ActionLink("Edit", "Edit", new { id=item.Semester_Id }) |
@Html.ActionLink("Details", "Details", new { id=item.Semester_Id }) |
@Html.ActionLink("Delete", "Delete", new { id=item.Semester_Id })
}

it gives this error on index i just check the index

9 Replies

Know the answer? Post it — somebody with the same question will find it here.

Ashutosh Gupta6y ago
Accepted answer
you are getting error not just because of your code, but reference of /Views/Shared/_LayoutStudent.cshtml in your view, which looks like need some student information.. that why you need to have student when you execute this query.

thanks.
Mark Tabor6y ago
I noticed when in query i make the inner join to left join it gets the data

but the issue is not getting the data instead on index if i have no data then it should show empty view but it gives error
Mark Tabor6y ago
Thanks
Ashutosh Gupta for continuous help , as i have not column in db which is related to Students so for that do i need to create first a column to the database , and then create a navigation property in the class then i would be able to include that in my controller code
var semesters = db.Semesters.Include(s => s.Programss).Include(s => s.yearss).Include(s=>s.students)
the highlighted student object is not available now it gives error and not shows in suggestion as i do not have property in my class and i cannot have property unless i add a column to the database as well.
Ashutosh Gupta6y ago
ok, it seems one of your DB table Semester, programms or years has dependencies ith db.student table.
can you include student table in your query and then check it. make one join with student table and check.

make sure all depencencies are loaded if any woth student table also.
Mark Tabor6y ago

index view controller
Mark Tabor6y ago
although i add one row to the db as shown below using sql server not using view

below is in the index controller it run first line and then second line but after second row when it comes to } i check the semester it get no value and below is the inner query
SELECT
[Extent1].[Semester_Id] AS [Semester_Id],
[Extent1].[Semester_Title] AS [Semester_Title],
[Extent1].[Semester_Code] AS [Semester_Code],
[Extent1].[Semester_Duration_In_Weeks] AS [Semester_Duration_In_Weeks],
[Extent1].[Status] AS [Status],
[Extent1].[Program] AS [Program],
[Extent1].[Year] AS [Year],
[Extent1].[Semester_Start_Date] AS [Semester_Start_Date],
[Extent1].[Semester_End_Date] AS [Semester_End_Date],
[Extent1].[Semester_Credit_Hours] AS [Semester_Credit_Hours],
[Extent1].[Date_Created] AS [Date_Created],
[Extent1].[Date_Modified] AS [Date_Modified],
[Extent1].[Added_By] AS [Added_By],
[Extent2].[Id] AS [Id],
[Extent2].[Program_Title] AS [Program_Title],
[Extent2].[Program_duration_Years] AS [Program_duration_Years],
[Extent2].[Status] AS [Status1],
[Extent2].[program_type] AS [program_type],
[Extent2].[Start_Date] AS [Start_Date],
[Extent2].[End_Date] AS [End_Date],
[Extent2].[Date_Created] AS [Date_Created1],
[Extent2].[Date_Modified] AS [Date_Modified1],
[Extent3].[Id] AS [Id1],
[Extent3].[Name] AS [Name],
[Extent3].[IsActive] AS [IsActive],
[Extent3].[Date_Created] AS [Date_Created2],
[Extent3].[Date_Modified] AS [Date_Modified2]
FROM [dbo].[Semesters] AS [Extent1]
INNER JOIN [dbo].[Programs] AS [Extent2] ON [Extent1].[Program] = [Extent2].[Id]
INNER JOIN [dbo].[Years] AS [Extent3] ON [Extent1].[Year] = [Extent3].[Id]
----
it runs the controller code and after that it gives this below screen
Ashutosh Gupta6y ago
ok, can you also highlight which line throwing the exception?
Mark Tabor6y ago
public System.Data.Entity.DbSet Semesters { get; set; }

Ashutosh Gupta it is simply dbset<> as all other are
Ashutosh Gupta6y ago
can you check db.Semesters type, is it list or dictionary?

The model item passed into the dictionary is of type 'System

Index

Ashutosh Gupta for continuous help , as i have not column in db which is related to Students so for that do i need to create first a column to the database , and then create a navigation property in the class then i would be able to include that in my controller code

Ashutosh Gupta it is simply dbset<> as all other are